package main

import (
	"html/template"
	"log"
	"net/http"
	"time"
)

// PageData holds data to be rendered in templates
type PageData struct {
	Title string
	Page  string // Used by index.html to decide which template to include on full load
	Time  string
}

// Global template variable
var tmpl *template.Template

func main() {
	// 1. Parse Templates
	// standard lib 'Must' panics if parsing fails (good for startup)
	tmpl = template.Must(template.ParseGlob("public/templates/*.html"))
	tmpl = template.Must(tmpl.ParseGlob("public/templates/*/*.html"))

	// 2. Setup Router (Go 1.22+ Standard Library Mux)
	mux := http.NewServeMux()

	// 3. Static Files
	// "GET /static/" matches any path starting with /static/
	fileServer := http.FileServer(http.Dir("./public/assets"))
	mux.Handle("GET /public/assets/", http.StripPrefix("/public/assets/", fileServer))

	// 4. Routes
	mux.HandleFunc("GET /", homeHandler)
	mux.HandleFunc("GET /explore", exploreHandler)
	mux.HandleFunc("GET /songon", songonHandler)
	mux.HandleFunc("GET /deposer-annonce", deposerAnnonceHandler)
	mux.HandleFunc("GET /inscription", inscriptionHandler)
	mux.HandleFunc("GET /contact", contactHandler)
	
    // Example POST to show HTMX form handling
	mux.HandleFunc("POST /contact", contactPostHandler)

	log.Println("Starting server on :8080")
	if err := http.ListenAndServe(":8080", mux); err != nil {
		log.Fatal(err)
	}
}

// Helper function to render pages with "If Else" logic for HTMX
func render(w http.ResponseWriter, r *http.Request, pageName string, data PageData) {
	// Check if request is from HTMX
	isHtmx := r.Header.Get("HX-Request") == "true"

	// Ensure the Page field is set for the layout to use
	data.Page = pageName

	if isHtmx {
		// IF HTMX: Render only the partial (e.g., "home", "songon")
		// We set the content type slightly differently usually, but HTML is fine.
		err := tmpl.ExecuteTemplate(w, pageName, data)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
		}
	} else {
		// ELSE: Render the full layout ("index"), which includes the partial
		err := tmpl.ExecuteTemplate(w, "index", data)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
		}
	}
}

// --- Handlers ---

func homeHandler(w http.ResponseWriter, r *http.Request) {
    // Prevent catch-all "/" from matching non-existent paths
	if r.URL.Path != "/" {
		http.NotFound(w, r)
		return
	}

	data := PageData{
		Title: "Home",
		Time:  time.Now().Format(time.Kitchen),
	}
	render(w, r, "home", data)
}

func exploreHandler(w http.ResponseWriter, r *http.Request) {
	data := PageData{
		Title: "Explore",
		Time:  time.Now().Format(time.Kitchen),
	}
	render(w, r, "explore", data)
}

func songonHandler(w http.ResponseWriter, r *http.Request) {
	data := PageData{
		Title: "Songon",
		Time:  time.Now().Format(time.Kitchen),
	}
	render(w, r, "songon", data)
}

func deposerAnnonceHandler(w http.ResponseWriter, r *http.Request) {
	data := PageData{
		Title: "Déposer",
		Time:  time.Now().Format(time.Kitchen),
	}
	render(w, r, "deposer-annonce", data)
}

func inscriptionHandler(w http.ResponseWriter, r *http.Request) {
	data := PageData{
		Title: "Inscription",
		Time:  time.Now().Format(time.Kitchen),
	}
	render(w, r, "inscription", data)
}

func contactHandler(w http.ResponseWriter, r *http.Request) {
	data := PageData{
		Title: "Contact",
	}
	render(w, r, "contact", data)
}

func contactPostHandler(w http.ResponseWriter, r *http.Request) {
    // Emulate processing
    time.Sleep(500 * time.Millisecond)
    
    // Return a snippet to replace the form
    w.Write([]byte(`<div class="card" style="background:#dcfce7; border:1px solid #86efac;">
        <h2 style="color:#166534">Message Sent!</h2>
        <p>Thank you for contacting us.</p>
        <button class="btn" hx-get="/contact" hx-target="#view">Back</button>
    </div>`))
}